Guess-and-Test method of Fossorier for construction QC-LDPC codes with CPM of weigth more than 1.
From Fossorier article M.P.C. Fossorier, "Quasi-cyclic low-density parity-check codes from circulant permutation matrices", IEEE Trans. Inf. Theory, vol. 50, no. 8, pp. 1788-1793, 2004.